Renormalized band structure of Sr2RuO4: A quasiparticle tight-binding approach

Zabolotnyy, V. B.; Evtushinsky, D. V.; Kordyuk, A. A.; Kim, T. K.; Carleschi, Emanuela; Doyle, Bryan P.; Fittipaldi, R.; Cuoco, Mario; Vecchione, A.; Борисенко, С. В.

doi:10.1016/j.elspec.2013.10.003

Cited by 45 publications

(44 citation statements)

References 86 publications

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“…The diagonalization of the combined Hamiltonian, H = H 0 + H SOC , yields the electronic band-structure that shows two electron-like Fermi surface (FS) pockets around the Γ and a hole-like FS pocket around the M -point of the BZ 37 . The resulting Fermi surface topology and band-structure are shown in the insets of Fig.…”

Section: Model and Methodsmentioning

confidence: 99%

“…and we employ λ = 35meV 37 . The diagonalization of the combined Hamiltonian, H = H 0 + H SOC , yields the electronic band-structure that shows two electron-like Fermi surface (FS) pockets around the Γ and a hole-like FS pocket around the M -point of the BZ 37 .…”

Section: Model and Methodsmentioning

confidence: 99%

“…In the inelastic neutron scattering this nesting yields the incommensurate magnetic fluctuations peaked at ω sf = 6meV, which are polarized along z-direction. The parameters of the non-interacting Hamiltonian are fixed in our case by the fit to the ARPES experiments 37 . Thus we employ U = 0.12eV and J = 0.25U to reproduce the frequency position of 6meV of the incommensurate spin fluctuations at Q 1 in the longitudinal response, as shown in Fig.1(a).…”

Section: Model and Methodsmentioning

confidence: 99%

“…( 2) and the hopping parameters (t 1 = 88, t 2 = 9, t 3 = 80, t 4 = 40, t 5 = 5, µ = 109 (all in meV)) are fitted to the available ARPES experiments 37 . In addition, we include the onsite spin-orbit coupling 35,36,51 , H SOC = λS · L, where S and L are the spin and angular momentum operators.…”

Section: Model and Methodsmentioning

confidence: 99%

“…In this paper, we study the evolution of the magnetic anisotropy of the spin susceptibility in Sr 2 RuO 4 in the presence of spin-orbit coupling and anisotropic strain using the tight-binding model fitted to the available ARPES results 37 . We compute the components of the spin susceptibility to obtain the full structure of the spin anisotropy within the itinerant description for the Hubbard-Hund type of the interaction model.…”

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confidence: 99%

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Anisotropic spin fluctuations in Sr2RuO4 : Role of spin-orbit coupling and induced strain

et al. 2016

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We analyze the spin anisotropy of the magnetic susceptibility of Sr2RuO4 in presence of spin-orbit coupling and anisotropic strain using quasi-two-dimensional tight-binding parametrization fitted to the ARPES results. Similar to the previous observations we find the in-plane polarization of the low q magnetic fluctuations and the out-of-plane polarization of the incommensurate magnetic fluctuation at the nesting wave vector Q1 = (2/3π, 2/3π) but also nearly isotropic fluctuations near Q2 = (π/6, π/6). Furthermore, one finds that apart from the high-symmetry direction of the tetragonal Brillouin zone the magnetic anisotropy is maximal, i.e. χ xx = χ yy = χ zz . This is the consequence of the orbital anisotropy of the xz and yz orbitals in the momentum space. We also study how the magnetic anisotropy evolves in the presence of the strain and find strong Ising-like ferromagnetic fluctuations near the Lifshitz transition for the xy-band.

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Section: Model and Methodsmentioning

confidence: 99%

Section: Model and Methodsmentioning

confidence: 99%

Section: Model and Methodsmentioning

confidence: 99%

Section: Model and Methodsmentioning

confidence: 99%

mentioning

confidence: 99%

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Anisotropic spin fluctuations in Sr2RuO4 : Role of spin-orbit coupling and induced strain

et al. 2016

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Angle, Spin, and Depth Resolved Photoelectron Spectroscopy on Quantum Materials

et al. 2020

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The role of X-ray based electron spectroscopies in determining chemical, electronic and magnetic properties of solids has been well known for several decades. A powerful approach is angle-resolved photoelectron spectroscopy, whereby the kinetic energy and angle of photoelectrons emitted from a sample surface are measured. This provides a direct measurement of the electronic band structure of crystalline solids. Moreover, it yields powerful insights into the electronic interactions at play within a material, and into the control of spin, charge and orbital degrees of freedom; central pillars of future solid state science. With strong recent focus on research of lower-dimensional materials and modified electronic behaviour at surfaces and interfaces, angle-resolved photoelectron spectroscopy has become a core technique in the study of quantum ma-1 terials. In this review, we provide an introduction to the technique. Through examples from several topical materials systems, including topological insulators, transition metal dichalcogenides, and transition metal oxides, we highlight the types of information which can be obtained. We show how the combination of angle, spin, time and depth-resolved experiments are able to reveal 'hidden' spectral features, connected to semiconducting, metallic and magnetic properties of solids, as well as underlining the importance of dimensional effects in quantum materials.

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Quasi-particle interference of the van Hove singularity in Sr2RuO4

et al. 2021

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The single-layered ruthenate Sr2RuO4 is one of the most enigmatic unconventional superconductors. While for many years it was thought to be the best candidate for a chiral p-wave superconducting ground state, desirable for topological quantum computations, recent experiments suggest a singlet state, ruling out the original p-wave scenario. The superconductivity as well as the properties of the multi-layered compounds of the ruthenate perovskites are strongly influenced by a van Hove singularity in proximity of the Fermi energy. Tiny structural distortions move the van Hove singularity across the Fermi energy with dramatic consequences for the physical properties. Here, we determine the electronic structure of the van Hove singularity in the surface layer of Sr2RuO4 by quasi-particle interference imaging. We trace its dispersion and demonstrate from a model calculation accounting for the full vacuum overlap of the wave functions that its detection is facilitated through the octahedral rotations in the surface layer.

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Renormalized band structure of Sr2RuO4: A quasiparticle tight-binding approach

Cited by 45 publications

References 86 publications

Anisotropic spin fluctuations in Sr2RuO4 : Role of spin-orbit coupling and induced strain

Anisotropic spin fluctuations in Sr2RuO4 : Role of spin-orbit coupling and induced strain

Angle, Spin, and Depth Resolved Photoelectron Spectroscopy on Quantum Materials

Quasi-particle interference of the van Hove singularity in Sr2RuO4

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